Home
Class 12
PHYSICS
The resistivity of a potentiometer wire ...

The resistivity of a potentiometer wire is `40xx10^(-8)Omega-m` and its area of cross section is `8xx10^(-6)m^(2)`. If 0.2 A current is flowing through the wire, the potential gradient will be

A

`0.1 Vm^(-1)`

B

`10^(-2)Vm^(-1)`

C

`10^(-3)Vm^(-1)`

D

`10^(-4)Vm^(-1)`

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • NTA NEET SET 86

    NTA MOCK TESTS|Exercise PHYSICS|45 Videos

  • NTA NEET SET 88

    NTA MOCK TESTS|Exercise PHYSICS|45 Videos

Similar Questions

Explore conceptually related problems

The resistivity of potentiometer wire is 40xx10^(-8) ohm-metre and its area of cross-section is 8xx10^(-6) m^(2) . If 0.2 ampere current is flowing through the wire, the potential gradient of the wire is

The resistivity of a potentiometer wire is 40xx10^(-8) ohm-m and its area of cross-section is 8 xx 10^(-6) m^(2) . If a current of 0.4 A is flowing through the wire, then the potential gradient will be

Resistivity of potentiometer wire is 10^(-7) ohm metre and its area of cross-section is 10^(-6)m^2 . When a current l=0.1A flows through the wire, its potential gradient is:

The specific resistance of a potentiometer wire is 10^(-7) Omega m and the cross sectional area of the wire is 10^(-6)m^(2) . If a current of 0.1 A flows through the wire, then the potential gradient will be

A potentiometer wire has a resistivity of 10^(9)Omega cm and area of cross-section is 10^(-2)"cm"^(2) . If current of 0.01" mA" passes through the wire, potential gradient is

Specific resistance of a metal conductor is 4xx10^(-5)Omega m and its area of cross section is 8 cm^(2) when 0.2A current passes through the conductor then potential gradient of the conductor is

If the current in the primary circuit of a potentiometer wire of specific resistance is 40 xx 10^(-8)Omega -m and area of cross-section 8 xx 10^(-6)m^(2) is 0.5 amp. Then potential gradient of wire is –

A wire made of aluminum having resistivity rho = 2.8 xx10^(-8) Omega - m with a circular cross - section and has a radius of 2xx10^(-3) m. A current of 5 A flows through the wire . If the voltage difference between the ends is 1 V , the length of the wire in m is

If specific resistance of a potentiometer wire is 10^(–7 ) Omega m , the current flow through it is 0.1 A and the cross-sectional area of wire is 10^(–6) m^(2) then potential gradient will be

NTA MOCK TESTS-NTA NEET SET 87-PHYSICS
  1. A partical of mass m oscillates along the horizontal diameter AB insi...

    Text Solution

    |

  2. The real angle of dip, if a magnet is suspended at an angle of 30^(@) ...

    Text Solution

    |

  3. The resistivity of a potentiometer wire is 40xx10^(-8)Omega-m and its ...

    Text Solution

    |

  4. An ionization chamber with parallel conducting plates as anode and cat...

    Text Solution

    |

  5. A charge of 1 muC is divided into parts such that their charges are in...

    Text Solution

    |

  6. Two identical small conducting balls have positive charges q1 and q2 r...

    Text Solution

    |

  7. The primary winding of a transformer has 100 turns and its secondary w...

    Text Solution

    |

  8. A voltage of peak value 283 V and varying frequency is applied to seri...

    Text Solution

    |

  9. A planet of mass 4 times earth spins about itself and completes one ...

    Text Solution

    |

  10. Two satellites of masses m1 and m2 (m1 gt m2) are revolving around ear...

    Text Solution

    |

  11. The total energy radiated from a block body source at constant tempera...

    Text Solution

    |

  12. In a Carnot engine when T(2) = 0^(@)C and T(1) = 200^(@)C its efficien...

    Text Solution

    |

  13. Shown in the figure are three P – V diagrams. The case in which the wo...

    Text Solution

    |

  14. A magnetic dipole of magnetic moment 6xx 10^(-2) A m^2 and moment of ...

    Text Solution

    |

  15. A wire loop that encloses an area of 20 cm^2 has a resistance of 10 O...

    Text Solution

    |

  16. A coil of inductive reactance 1//sqrt(3)Omega and resistance 1Omega is...

    Text Solution

    |

  17. An eagle flies at constant velocity horizontally across the sky, carry...

    Text Solution

    |

  18. In the given figure , if the velocity of the block C at a particular i...

    Text Solution

    |

  19. A system is shown in fig. Assume that the cylinder remains in contact ...

    Text Solution

    |

  20. During beta^(-) emission

    Text Solution

    |